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Finding the Fourth Proportional to 399,571.69, 551,425.35 and 229,805.86

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Solution

The fourth proportional to 399,571.69, 551,425.35 and 229,805.86 is: 317,141.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,571.69 : 551,425.35 = 229,805.86 : x
  2. Step 2: Convert to fraction form
    399,571.69/551,425.35 = 229,805.86/x
  3. Step 3: Cross multiply
    399,571.69x = 551,425.35 × 229,805.86
  4. Step 4: Simplify right side
    399,571.69x = 126,720,776,782.55
  5. Step 5: Solve for x
    x = 126,720,776,782.55/399,571.69
  6. Step 6: Final answer
    x = 317,141.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.